A Swarm of Tiny Bots Could Inspect the Hidden Underbellies of Bridges

America's bridges are not—we're sorry to report—doing so great. Of the over 600,000 bridges in the U.S., more than half are over 30 years old, and 11 percent are structurally deficient. That makes inspecting bridges all the more important; unfortunately, the underside of a bridge is also pretty damn inaccessible to… »9/25/14 1:15pm9/25/14 1:15pm